when something is kept in its original state or in good condition [↪ preserve]
Eliot campaigned for the preservation of London's churches.
We are working for the preservation of the environment.
the preservation of our cultural heritage
methods of food preservation
the act of making sure that a situation continues without changing
the preservation of peace in the region
the degree to which something has remained unchanged or unharmed by weather, age etc:
The arena is in an exceptionally fine state of preservation.